Sheet-detector.



L F. NILES.' SHEET DETECTOR. APPLIGATHJN P1LBDMAR-21, 1912.

1,14,020, Patented 9ct. 2o, 1914.

, 2 s'HEms--SHBBT 1` wiTNEss/s.

I. F. NILBS. SHEET DETECTOR. ,APPLIGATXON FILED MAR. 21, 1912,

Patented Oct. 20, 1914.

2 SHEBTSWSIIEBT 2.

Zalm inem RVENG Ie".

MILES, DE PLINFI v HEW YRK,

SHEETJWETEC Application filed. Mach 2l,

I eminem;

Be if; known thai i, iin/'ING F. Nimes, e citizen oi" the United States, residing et Fiainieid, county ci' Union, and State 01"' New Jersey, have invented certain new and Liseffui Improvements in Sheet-Detectors, ifnily described and i'epi-esented the foi- .ownig specification end. the ecoonilmnying di'iiwinj forming part of the This invention relates to automatic sheet detectors for sheet fed printing machines.

One of its pi'incipai objects is to provide en iinpioved meciiimieni that. will detece the To all wfwm t may absence of a sheei'. from the impression cyl` index".

Another obigect is to provide an improved ii'ieciiaiism will also detect the lack oi i'egietiriion of a, sheet if improperly teken, up bj the: giippeie y iti?. another ebjeei; is lto provide an im- Jisfoved mechanism time wili deieci, :i muti ieted siieei ii." ich be ied to the gi'ippere.

Geiler' oiijece die inven'bioii not here iii viii sip'eeei in ehe following de Lion and in ne appended, ciiiiine l ing to the diewiilgs Figure l is periiai end eievetion oil i' index* showing the impio*einen; :is epjfiiied thereto; Fig. 2 is simile-i View sho y'ing die mechanism in a, diiifei'enposiion; Fig, 3 is e sectional elevation taken on fiile i e 3-3 of Fig. l; Fig'. e is e paitiai pion "View of the mechanism shown in Fig. 2; and Fig. 5 is e pien View partly in section epd partly broken away showing e plum? i155/ oii flippers and detector fingers.

v9yfiieiidevices of the character to which Ache invention relates aie to be employed to detect iack of 'registrat-ion the operation of such devices should closing ci the grippers upon the shee for ehe 'registration of the sheet is not; dicteemined until that time. Mechanism constructed in accordance with the invention Wiii, therefore, include means whereby ii; becomes operative Lf-ter the gi'ippers have eiesed. ,ii/Unie the pariienizir means to inc-- complsn this may be wideiy varied, in the embodiment shown, if; comprises e siation ary cam ring' 1G ioeaized at one end of the impression cyiinder il and concentric Wife the shiii' "L2 of ehe impression The cam l0 is circular in foim except ici" siidii depreseion 13 shown in Figsl and L3).

Specification of Zet-ters Fat-,entf

an impression e1- be timed to' follow the lio :in ii 1 which is goiii'neieii.. i che impression eyiinf ei" il mais i@ 1s ai seriee off coiiais one of wincn i y 7 'Bear-ing upon Y 1s shown at 17' in Fie' and i. and eeh 60 .coiizzi' ie`}}1fi' i id w'i preje-eoii 1S. i.- i ;\seiy mouneei upon in. Y' "t 1G beiween the collar 17 and e irai if) iS :i .eeeve 2O czufi'ying an :im: 21 haii/ing :in olil` ing pcsiiioned to Contact iifih. die er, project-ion ley as viewed in ifigiz` i i to the ami 2i is ehoimea pim' ei 23, constiuiingg one oi wecriee; kradially tiiiouiijii the Weil of 'cylinder'.Y A compe "i 7e beiweeii e Geiler li ifa. i and :i ebuii'iei'it L Cheli tu ii Ipression @dimer tends ie ifi' the pien "'outwai'd, and ifiiojeciii nth] above surfe e of ih Y I 75 4iii'ii'dee ef the cyi L? and meeimniem except when il'ie ioi'e cepression i3, whisk giippeie indice-*Led e" iiie sheet gei' 23, Uiiiess that is muifiizi inoiudeefi plural, y e@ gfeeleie being' cziimoitfitedt in'depencientiy Vei? one another, @zich 'eeier being aies adepted independently to i the actuation of the thrownui meeiizmiem eesoeisied Wih the detector. Vifiii I n i icuiee consxiucion for epe'aingg ,i so that they may ne m'dependeniy l ne described ley miiy and eotiizi entiy cause f J C the 'zie/main n oi j iixeehanism. may be Wideij verle@ desmibad' alom. been mede. to eiec; @She the plungers distributed along the shaft, re-

anti-clockwise direction,

and depress `the plunger 23, and that this tion herein described and illustrated in the movement of the shaft lG will depress all of accompanying drawings.

What is claimed is 1. 'An impression cylinder, a plurality of Ieelers 'located beneath the sheet path carried bythe cylinder and independently inovable to detect the absence oic :i sheet from the impression cylinder, a throw-out uiech anism, and connections between the said feelers and the throw-out mechanism whereby the detector movement of any one of the i'eelers will cause the actuation ci the tlirow out mechanism.

9.. in impression cylinder, grinners and gardless of their number or position. On the other hand, at the time the roller le moves opposite the cani depression 13, if any of the plungers 23 be driven outward under tension of its spring owing to the absence will move upward, raising the related projection 18 and rocking the shai't i6 in an thereby causing the actuation of the mechanis n now to be de scribed. Upon the trame at 3S is iulcrunied a pawl 29 provided with a tail 30 located adfcelers loca ed beneath the sheet path liacent the cam depression i3 and adapted to carried hy tne cylinder, the ieclers being be actuated by the' roller 14;. The tail is noi movable to operative position after actuation lpower arm is iulcrumed a lever 39 which is ,of the grippers, said .Eeelers having respectively a further and independent movement to detect the absence of va sheet from beneath the grippers, a throw-eut mechanism, and connections between said iteclers arid the throw-out mechanism, whereby the detector moveinentp any one of the celers vwill cause the actuation of the throw-out mecha nisni;

ln combination, an impression cylinder, grippers, As shaft longitudinally mounted in the cylinder, a plurality oi ieclers carried by the cylinder and adapted to nieve into operative position after the actuation oi the grip ers, the said tcelei's being further movable independently to detect the from beneath the grii'ipcrs, a

mally forced upward iby a spring 3l located between #thrust block Jfastened to the' frame and the pawl. and held in position hy a pin 33. Upon the frame a't Bei is ulcrumed a power arm which is continuously oscillatedby a cani 3G carried by the shaft l2, the cam hearing against a roller 3"? mounted upon the arm 35. At the extremity 38 of the attached at its-outer end to the throw-out mechanism indicated at Ll0. The inner end of the lever 39A is U-shaped and forms a socket into which the nose of the pawl 29 moves when its tail 30 is depressed, as described above. Q l

ln operation, the lever 39 normally vihrates idly about the point 39ans a fulcruin as the power-arm oscillate's. Should the pawl 29 be moved to engaging position, however, the nose of the pawl will Jormaa bloei; between the inner end of the lever 39 and the thrust block 32, and the lever 39 will new 'ulciuin upon the nos'e of the p'awl, as the lever is raised by the power arm, as shown in Fig. 2, and the consequent upward movement of its outer end will elevate the rod 4.0 of the throw-out mechanism, thus causing the cylinders to berthroivn out of 'printing` relation in the usual manner. AAs any inovement of the shaft i6 in an anti-clockwise direction, viewed in Fig. "i, will cause .the actuation of the throw-out mechanism, and alsoas any one ot the'feelers or plungers 28 is Aadapted by its connections to rock the, shaft 16 in this direction independently of the position of the remainingteelers, the throwoutl mechanism may be operated by any one of the series of celers, which arrangement is necessary in order to eicct the results descril'ied.

absence of a. sheet said shaft, and connections between the rcspcctive 'eelers and the said shaft whereby the detector movement oi' any ci a of: the.

nioveii'ient oit the said feelcis will cause a shaft to actuateA the lthrow-oilt iiicchaiiisin.

4,-. ln coinbinatipii, an impression cylinder, grippers, a rocleshait longitud-inally mount ed in the cylinder, a. plurality o if Atcelcrs carried by'the cylinder and adapted to move lt will he understood that changes and vawitnesses. w riations may be inade in the construction by llVliitr l1. n llilm.

which the invention claimed is carried into lVitncsses:

'l'tieiiiinn Knnnv,

not .to be confined to the particular constructhrow out mechanism lcontrolled by the increment oilI actuation et, the grippers the seid ieelers being' further.

a sheet troniheneaih the eripiiers, a thrizwico 

